Pump



Sept. 12, 1933. KLOSSQN 1,926,446

PUMP

Filed Sept. 8, 1931 2 Sheets-Sheet 1 if 16 J 19 I l 25 I INVENTOR i i 4Milne! EJ056012,

1 BY 6560mm ATTORNEYS Sept. 12, 1933.

M. M. KLossoN PUMP Filed Sept. 8, 1931 2 Sheets-Sheet 2 INVENTOR 2MbbaelMfUmmn,

@MM ATTORNEYS Patented Sept. 12, 1933 .PUMP

Michael M. Klosson, Kenmore, N. Y., assignor to Buffalo PumpsIncorporated, Buffalo, N. Y.

, Application September 8, 1931. Serial No. 561,745

4 Claims.

This invention relates to pumps and particularly to that class of suchdevices as are especially adapted for pumping liquid having solidmaterial in suspension. The pump of my invention comprises, generally, apermanent outer casing having fluid inlet and'exhaust openings and apump chamber, and an inner casing interfltting within and removablycarried by the permanent casing. The inner casing houses an impellerdrive shaft and water sealing means therefor, a portion of the innercasing, larger than the impeller in the pumping chamber, complementingthe outer casing to complete the pumping chamber, in such manner thatthe inner casing, with the impeller, may be installed within or removedfrom the permanent casing as a unit, for purposes of cleaning,adjustment, or repair. The fluid passages through the pump are ofregular and uninterrupted contour and the parts are so arranged that theimpeller is the only moving part within the fluid passage, so thatresistance to fluid flow and the possibility of clogging of the passagesare minimized.

These and other objects and advantages will become apparent from thefollowing description of one typical embodiment, reference being made tothe accompanying drawings, wherein:

Fig. 1 is a vertical elevation of a complete pump unit, portions of thestructure upon which the device is mounted being shown in section;

Fig. 2 is a vertical section of the pump unit of Fig. 1, portionsthereof being broken out to permit of enlargement of the view; and

Figs. 3 and 4 are horizontal cross-sectional views taken along lineIIIIII and IVIV, respectively, of Fig. 2. 4

As shown in Fig. 1, the pump unit, indicated generally at 10, may besuitably supported, as in the illustrated construction, which has abottom wall 11, and a cover 12. The outer or permanent casing of thepump has a lower tubular section 13, mounted upon a base pedestal 14which is provided with fluid intake openings 15, and an upper section 16having a peripheral flange 17 at its upper end which may be secured, asshown in Fig. 2, to a supporting ring 18 disposed about an opening inthe cover 12. The lower end of section 16 has a flange 19 with arecessed bottom 1 face 29, which receives intermediate or pump chamberportions 21 and 22 of the permanent outer casing, the sections 16 and 21being secured together by screws. Flanges are provided at the adjacentends of sections 21 and 22, through which connecting bolts extend.Section 22 is joined to the lower casing section 13 by a reducer 23. Theintermediate section 21 is of generally frustro-conical shape and hasits outer wall spaced from inner wall 24 by webs 25 to provideperipheral fluid discharge. passage 26. Wall 24 terminates inwardly in acircular opening 30 of slightly smaller diameter than the interior ofthe section 16.

An inner casing 27 has a lower end portion 28 of frustro-conica1 shapefor seating within the opening 30, forming a continuation of the wall24. The space between the portion 28 and the outer walls of the outercasing section 21 form a continuation of the passages 26 which mergeinto the pumping chamber 29. The upper end of the inner casing 27 isflanged as indicated at 31 in Fig. 2, and is secured by screws to thelower face of a motor pedestal 32, the latter resting upon and normallybeing secured against the upper face of flange 22 of the section 16, bybolts 33. A motor 34 is mounted upon the pedestal 32 75.

and an impeller actuating shaft 35 extends downwardly from the motorthroughthe pedestal 32 and the inner casing 27.

Packing material 36, for preventing water and gases from rising from theinterior of casing 27, is fitted in a recess in the lower portion of thepedestal, and is held in place by a split stuffing gland 37. Access maybe had to the pedestal interior through openings 38, shown in Figs. 2and 3, either for adjusting the gland or for applying oil to thepacking, an oil passage39 being formed in the pedestal bottom for thelatter purpose. 7

A bearing 41, preferably of the oilless type, is fitted to the bottomportion of the casing 27 for journalling the lower end of the shaft 35,.Packing 42 is placed beneath the bearing for preventing entrance ofliquid into the bearing or into the interior of the casing, being heldin place by the impeller 44, which is preferably keyed to the shaft. Asillustrated in Fig. 2, the packing 42, comprises a plurality of washersflttedbetween the bore of member'28 and the shaft 35, the lower washerabutting the hub of the impeller 44 and the upper washer abutting thebearing member '41, and a coiled spring extending about the shaft andcompressed between the upper and lower washers. The impeller is retainedon the shaft by a cap nut 45, a set screw 46 being thread- 5 ed into thenut and against the shaft 35 for looking the cap nut in place. Lubricantmay be applied to the packing 42 through a conduit 47, which extendsfrom the motor pedestal 32 to a groove 48 about the packing. Theimpeller 44 0 r may be of any suitable form, but is preferably of themultiple-vane type illustrated.

It will be understood that upon rotation of the shaft an impeller by themotor 34, sludge and liquid will be drawn through the openings 15 in thebase pedestal 14, lifted vertically through the conduit 13, and expelledradially through the exhaust passage 26. The outer end of the latter ispreferably of gradual curvature and will be efficient for conductingfluid in either direction. Thus, by reversing the direction of rotationof the motor and impeller, liquid may be drawn radially into the passage26 and expelled from the bottom of the section 13 and through theopenings 15. 7

The lower surface of the motor pedestal 32 is shouldered to provide aprotuberance 32to seat within the interior of the casing section 16.This provides, in conjunction with the packing 36 and gland 3'7, asubstantially tight seal against gas and liquid in the casing 16 and2'7, thereby preventing such substances from reaching the motor.

The impeller blade andthe enlarged end portion 28 of the inner casingare of smaller radius thanthe opening 30 and the interior of the upperpermanent casing section 16, so that upon removal of the bolts 33, theassembly, including the impeller, inner casing, motor pedestal andmotor, may be withdrawn as a unit from the outer permanent casing,either for the purpose of renewing or for repairing parts or forcleaning them, without the necessity of workmen entering the spacebeneath the cover 12.

It will further be'understood that the specific arrangement andformation of the parts herein described and illustrated is merelyexemplary of the principles of the invention, which may be applied todevices having different structural characteristics, all within theprovision of this invention.

What is claimed is:

1. In a pump, a pair of vertically arranged outer casing sectionscomprising a pump cham- I her, a supporting casing section fixed insuperimposed relation to the uppermost of said pair of sections, thelatter having a peripheral fluid passage extending upwardly andoutwardly from the lower of said 'pair of sections, a motor pedestal forsupporting motor means superimposed upon said supporting section andremovably secured thereto, an inner casing section secured to thepedestal and extending downwardly through the supporting casing sectionand interfitting' with the uppermost of saidpair of sections, the lowerend of said inner casing section forming a portion of the upper wall ofsaid peripheral fluid passage, an impeller shaft extending from saidmotor means through said inner casing, and an impeller in said pumpchamber secured to the shaft, said motor means, pedestal, inner casing,

shaft and impeller being removable as a'unit from the other of saidcasing sections.

2. In a pump, an outer casing section, a medial portion of said casingbeing of substantially frustro-conical shape, an annular wall spaced byWebs from the outer walls of said frustro-conical portion andcooperating therewith to form an axially and radially extending fluidpassage, said annular wall having a central opening concentric with thepassage through said casing, an inner casing section extending throughthe end of the outer casing adjacent the enlarged end of saidfrustro-conical portion, one end of said inner casingsectioninterfitting in said opening and providing an inward continuationof said annular wall, the other end of said inner casing sec tion beingreleasably secured to the outer casing, an impeller within said outercasing adjacent the reduced end of the frustro-conical portion thereof,and a drive shaft for the impeller extending through said inner casing,said impeller being of smaller diameter than the opening in the annularwall, whereby the inner casing section, impeller and shaft may bewithdrawn as a unit from the outer casing.

-3. In a pump, an outer casing section extending between and secured toupper and lower supporting structures, a medial portion of said casingbeing of substantially frustro-conical shape, an annular wall spaced bywebs from the outer wall of the frustro-conical portion and cooperatingtherewith to form an upwardly and outwardly extending fluid passage,said annular wall having a central opening concentric with the passagethrough the casing, an inner casing section extending downwardly fromthe upper end of the outer casing, the lower end of said inner casingbeing of substantially conical shape and interfitting in said opening toprovide an inward and downward continuation of said annular wall, meansat the upper end of said inner casing and above said upper supportingstructure for releasable securement to theouter casing, an impellershaft extending through the inner casing and an impeller carried therebybeneath the conical end of the inner casing, and packing means for saidshaft associated with the inner casing at the upper and lower endsthereof, the inner casing, impeller and impeller shaft and said meansbeing adapted to be withdrawn as a unit from said outer casing by meansabove the upper supporting structure.

4. In a pump, a supporting casing having a tubular bore extendingsubstantially vertically therethrough, said bore communicating with anopening through the casing adjacent the lower end of said casing andwith an annular opening through said casing intermediate of the upperand lower ends thereof, means at the upper end of the casing forsupporting the same, an impeller shaft extending through the bore of thesupporting casing and carrying an impeller disposed between' the firstmentioned opening and the annular opening for effecting fluid passagebetween said openings, a tubular member housing said impeller shaft andextending through the bore of the casing between the impeller and theupper end of the casing, wall means at the lower end of said tubularmember fitted to the bore of said casing to cooperate with said annularopening to provide an annular fluid passage above the impeller, andmeans at the upper end of the tubular member for supporting the latterin' secured relation to the casing; said tubular member and wall meansat the lower end thereof and the impeller being of smaller diameter thanthebore of the casing thereabove, whereby they may be withdrawn as aunit from the upper end of said casing.

' MICHAEL M. KLOSSON.

